At Ferny Grove, overnight temperatures were close to average and daytime temperatures were above average. Rainfall was above average with several days of thunderstorm activity at the end of the month, that brought moderate to heavy falls. Mean relative humidity was near average, mean dew point was above average and mean air pressure was below average. There were 6 thunderstorms (7 thunder days).
Monthly mean daily minimum temperature: 15 ºC, 0.4 ºC above average and 0.4 ºC higher than same month in 2019.
Monthly mean daily maximum temperature: 27.8 ºC, 1 ºC above average and 0.1 ºC lower than same month in 2019.
Monthly mean temperature: 21.4 ºC, 0.7 ºC above average, 0.2 ºC higher than the same month in 2019.
Lowest temperature: 11.6 ºC on 10 October 2020 at 4:15 AM. Same month in 2019 was 9.2 ºC. This is the highest monthly minimum temperature for October on record, exceeding the previous record high of 10.9 ºC in 2017 on 22 October at 5:25 AM.
Highest temperature: 32.6 ºC on 31 October 2020 at 12:08 PM. The same month in 2019 was 34.7 ºC.
Lowest daily maximum temperature: 23.8 ºC on 14 October 2020 at 11:31 AM. This is the highest monthly highest daily maximum temperature for October on record since 24 ºC in 2014 on 9 October at 2:45 PM. Same month in 2019 was 21.3 ºC.
Highest daily minimum temperature: : 20.1 ºC on 24 October 2020 at 5:19 AM. Same month in 2019 was 19.6 ºC.
Minimum temperatures in October were near or below average in the first half of the month before warm nights during most of the second half of the month. During the first half of the month until the 21st the coolest nights were on 1st and 10th at 3 ºC below average, and otherwise within 2 ºC of the long term average. A 8 day warm period between the 22nd and 29th of up to 6 ºC above average on the 25th. The 30th was 2 ºC below average and 4 ºC above average on the 31st.
October maximum temperatures were above average throughout the month with very cool days and several days close to average, mostly in the first half of the month. The first 13 days of the month saw near average temperatures except for the 9th being 5 ºC above average. The 14th was 3 ºC below average before several days during the second half of the month that were above average of up to 6 ºC above average on the 31st. The 19th, 22nd and 27th was however 3 ºC below average.
Monthly Mean Minimum Grass Temperature: 12.9 ºC (0.1 ºC lower than same month in 2019).
Lowest Minimum Grass Temperature: 9.1 ºC on 10 October 2020 (1.3 ºC higher than same month in 2019). This coincided with the lowest minimum air temperature of 11.6 ºC for the month.
Highest Minimum Grass Temperature: 17.9 ºC on 24 October 2020 (0.4 ºC lower than same month in 2019). This coincided with the highest minimum air temperature of 20.1 ºC for the month.
Highest Minimum Grass Temperature Depression: 3.5 ºC on 14 October 2020 with a minimum grass temperature of 10.6 ºC and an air temperature of 14.1 ºC.
Lowest Minimum Grass Temperature Depression: 0.8 ºC on 26 October 2020 with a minimum grass temperature of 17.9 ºC and an air temperature of 20.1 ºC.
Monthly mean daily minimum MSL pressure: 1014.3 hPa (1.5 hPa lower than same month in 2019).
Monthly mean daily maximum MSL pressure: 1019 hPa (1.8 hPa lower than same month in 2019). This is the lowest on record for October exceeding the previous record low of 1019.3 hPa in 2009.
Mean MSL pressure: 1016.6 hPa (0.7 hPa below average, 1.9 hPa lower than same month in 2019).
Lowest MSL pressure: 1004.5 hPa on 31 October 2020 at 2:44 PM. The same month in 2019 saw 1006.5 hPa.
Highest MSL pressure: 1027.7 hPa on 3 October 2020 at 9:33 AM. The same month in 2019 saw 1030 hPa.
Monthly mean daily minimum relative humidity: 45.4 % (5.8 % higher than same month in 2019 and 1.8 % below average).
Monthly mean daily maximum relative humidity: 93.7 % (5 % higher than same month in 2019 and 3.4 % above average).
Mean relative humidity: 69.5 % (5.8 % higher than same month in 2019 and 0.8 % above average).
Lowest relative humidity: 28 % on 30 October 2020 at 1:49 PM (10% higher than this month in 2019). This is the second highest monthly minimum humidity for October on record and the highest since the current record high of 31 % in 2010 on 17 October at 3:21 PM.
Highest relative humidity: 98 % on 29 October 2020 at 5:43 AM (equal to this month in 2019).
Monthly mean daily minimum dew point: 12.7 ºC (0.5 ºC above average).
Monthly mean daily maximum dew point: 18.2 ºC (1.1 ºC above average).
Monthly mean dew point: 15.5 ºC (0.8 ºC above average).
Lowest dew point: 8.4 ºC on 10 October 2020 at 4:58 AM. This is the highest monthly minimum dew point for October on record, exceeding the previous record high of 7.4 ºC in 2018 on 26 October at 5:45 PM.
Highest dew point: 23.5 ºC on 25 October 2020 at 12:26 PM.
Highest wind gust: 62 km/hr on 28 October 2020 at 3:01 PM.
Highest wind speed: 27 km/hr on 31 October 2020 at 6:18 PM (Moderate Force Wind).
Total Wind Run: 3023.6 km (806.8 km lower than same month in 2019), 191.2 km above average and 1.1 % above average. This is the second highest on record for October total wind run and the highest since the current record high of 3830.4 km in 2019.
Mean wind speed: 4.1 km/hr (0.9 km/hr lower than this month in 2019), 0.1 km/hr above the long term average). This is the second highest on record for October and the highest since the current record high of 5.2 km/hr in 2019.
Daily Mean Maximum Wind Gust: 28 km/hr (0.8 km/hr lower than this month in 2019), 0.9 km/hr above average and 3.7% above average.
Daily Mean Maximum Wind Speed: 14.4 km/hr, equal to this month in 2019), 3.7 km/hr above average and 35.3 % above average. This is the second lowest on record for October and lowest since 9.7 km/hr in 2018.
Dominant Direction: NE (NE this month last year).
Rainfall total: 119.5 mm, 55 mm above average (185.4 % of long term average), 76.3 mm above the long term median and 262.9 % of the site median. This is higher than this month last year which was 48.5 mm. Automatic rain gauge was 118.4 mm (+0.1 % of manual gauge).
Highest daily rainfall total: 35 mm on 28 October 2020.
Number of rain days: 12 days, 4 greater than same month in 2019 and 4.2 days above average.
The year to date total is 984.9 mm (127.4 mm above average and 11.5 % above average).
Highest rainfall rate: 261.8 mm/hr on the 25 October 2020 at 2:14 PM. This rainfall rate for October exceeded the previous record high of 216.3 mm/hr in 2018 on 21 October at 4:24 PM.
Highest hourly rainfall total: 21.4 mm on the 25 October 2020 at 2:26 PM. This is the second highest hourly rain for October on monthly basis and the highest since 21.8 mm in 2018 on 5 October at 3:50 PM.
A mild thunderstorm and light showers during some days in the first half of the month. From the 19th to the end of the month an active period of showers, rain and thunderstorms occurred on many of these days, with some moderate to heavy falls. A severe thunderstorm in the afternoon of the 25th brought 14 mm of rainfall in 8 minutes and marble sized hail. 2 hours of thunder in the afternoon of the 31st, with very little rainfall as 4 thunderstorms passed close by.
There were 2 days of morning dew.
Smoke haze on 17th and 18th.
An SSE to ESE wind change in the morning of the 10th, an E to SSE wind change in the afternoon of the 19th and an SSE to SE wind change in the morning of the 27th.
The minimum temperature was reached very early in the day on a number of days: 12th, 14th, 23rd, 27th.
Cold in the afternoon of the 24th as the maximum temperature was reached in the middle of the day with rain and drizzle.
Light but gusty W to SW winds with a severe thunderstorm on the 25th.
A cool to cold day on the 27th with cloudy skies and showers and thundery rain.
A moderate thunderstorm in the afternoon of the 28th brought gusty wind gusting to 62 km/hr.
A hot day on the 31st easing in the afternoon with 4 nearby thunderstorms.
High pressure systems brought stable conditions or onshore moisture in the first half of the month, before slow moving surface troughs brought a period of instability later in the month. This combined with weak high pressure ridges along the east Queensland coast as well.
Long period rainfall totals continued to remain well below average during most periods, that improved for some of the periods. 6 monthly rainfall improved by 130 mm to 64.5 mm below average. 9 monthly rainfall remained above average at 97.2 mm above average while 12 month rainfall was 12.2 mm above average, improving from 58.6 mm below average in the previous month. 18 month to 48-month rainfall was between 166.6 mm below average for 12 month rainfall and 323.3 mm below average for 36 month rainfall. Compared with the same period in the previous year most of these periods improved, however 24 and 36 monthly rainfall worsened and was the lowest since 2007 (455.8 mm below average for 24 monthly and 624.9 mm below average for 36 monthly rainfall).
For October there were 3 existing records exceeded or equalled, along with 3 records that was highest/lowest in at least 7 years.
For more detailed analysis refer to the “Monthly Meteorological Report for October 2020”
Summary of Averages and Extremes for October 2020 for Ferny Grove, Brisbane, Queensland, Australia |
||||||||||||||||
|
Min Temp |
Max Temp |
Mean Temp |
Temp Range |
Min Grass Temp |
Min Grass Temp Depression |
Min Relative Humidity |
Max Relative Humidity |
Mean Relative Humidity |
Min MSL pressure |
Max MSL Pressure |
Mean MSL Pressure |
Dew Point |
Max Wind Gust |
Max Wind Speed |
Daily rain |
Average |
15.0 |
27.8 |
21.4 |
12.9 |
12.9 |
2.1 |
45.4 |
93.7 |
69.5 |
1014.3 |
1019.0 |
1016.6 |
15.5 |
28.0 |
14.4 |
3.9 |
Min |
11.6 |
23.8 |
19.0 |
5.4 |
9.1 |
0.8 |
28 |
82 |
60 |
1004.5 |
1011.5 |
1008.3 |
8.4 |
19.0 |
10.0 |
|
Max |
20.1 |
32.6 |
25.7 |
17.7 |
17.9 |
3.5 |
72 |
98 |
85 |
1024.0 |
1027.7 |
1025.8 |
23.5 |
62.0 |
27.0 |
35.0 |
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
119.5 |
Summary for October 2020 from long term average for Ferny Grove, Brisbane, Queensland, Australia
|
||||||||
|
Temperature |
Relative Humidity |
MSL Pressure |
Dew Point |
Wind Gust |
Wind Speed |
Rainfall |
Rainfall as Fraction of monthly average (%) |
Average |
+0.7 |
+0.8 |
-0.7 |
+0.8 |
+3.6 |
+4.4 |
+55.0 |
185.4 |
Min |
+0.4 |
-1.8 |
|
+0.5 |
|
|
|
|
Max |
+1.0 |
+3.4 |
|
+1.1 |
|
|
+92.7 |
|
Monthly averages and extremes for Year of 2020 to Date for Ferny Grove, Brisbane, Queensland, Australi |
|||||||||||
|
Temperature |
Temperature Anomaly from Long Term Avg. |
Rain total |
Rain Anomaly |
Rain days |
||||||
|
Avg Min |
Avg Max |
Low Min |
High Max |
Average |
Min |
Max |
Average |
|
|
|
Jan-20 |
21.9 |
32.2 |
18.6 |
35.4 |
27.0 |
+1.2 |
+1.5 |
+1.4 |
183.3 |
+38.3 |
15 |
Feb-20 |
21.2 |
30.4 |
19.6 |
37.6 |
25.8 |
+0.9 |
+0.4 |
+0.7 |
389.2 |
+227.4 |
20 |
Mar-20 |
18.7 |
29.1 |
15.1 |
35.2 |
23.9 |
-0.5 |
+0.4 |
-0.0 |
142.4 |
+18.2 |
15 |
Apr-20 |
16.0 |
29.1 |
11.9 |
34.2 |
22.6 |
+0.0 |
+2.7 |
+1.4 |
13.5 |
-80.3 |
9 |
May-20 |
12.7 |
24.2 |
9.1 |
28.1 |
18.4 |
+0.2 |
-0.0 |
+0.6 |
12.1 |
-90.9 |
8 |
Jun-20 |
11.0 |
22.6 |
5.9 |
25.8 |
16.8 |
+0.6 |
+1.2 |
+0.9 |
45.5 |
-16.4 |
13 |
Jul-20 |
10.0 |
22.2 |
5.0 |
26.1 |
16.1 |
+1.1 |
+0.4 |
+1.2 |
50.4 |
+16.9 |
8 |
Aug-20 |
10.1 |
24.0 |
4.2 |
27.9 |
17.0 |
+1.2 |
+1.3 |
+1.2 |
14.8 |
-21.7 |
3 |
Sep-20 |
13.3 |
25.9 |
8.0 |
32.6 |
19.6 |
+1.3 |
+0.5 |
+0.9 |
14.2 |
-19.0 |
3 |
Oct-20 |
15.0 |
27.8 |
11.6 |
32.6 |
21.4 |
+0.5 |
+1.1 |
+0.8 |
119.5 |
+55.0 |
12 |
YTD |
15.0 |
26.7 |
4.2 |
37.6 |
20.9 |
+0.7 |
+0.9 |
+0.9 |
984.9 |
+127.4 |
106 |
Based on Bureau of Meteorology Climate summaries (Copyright) of which some data was obtained from. From September 2017 the Bureau of Meteorology Climate summaries were expanded to provide data from official stations in and near the Greater Brisbane “Greater capital city Statistical Area” (GCCSA).
Data Copyright Ferny Grove Weather 2020, Produced 17/01/21. Data Checking has been carried out but errors may still be present and therefore there is no assurance of correctness. Corrections may be made at a later data if errors or deficiencies are found and/or improvements in data handling techniques are made, though data with major improvements may not be updated in this summary. Data measured with professional moderate accuracy equipment. This replaced non professional equipment of low accuracy with differences in the measured data. The new equipment measures the daily average wind speed and wind run about 40 % higher. Daily rainfall and grass minimum temperature is measured using non-professional equipment of moderate accuracy.
Site Commencement data is April 15 2009 except for daily rainfall which commenced on January 1 1987. Not all variables have been measured over the entire station record. Most variables are measured over a 24 hour period ending in the evening and over a 24 hour period from midnight effective October 5 2018. Maximum temperatures are measured over the 24 hours from 9 am on the day of measurement. Minimum temperatures are measured over the 24 hours to 9 am of the day of measurement. Rainfall is measured over 24 hours to 9am and recorded on that day. This is the same as the official time standard. Some rainfall measurements are not made at 9am and is adjusted based on the automatic record. Minimum Grass Temperature is measured over an approx. 12 hour period ending in the early morning. MSL refers to Mean Sea Level, which is the standard meteorological method of measuring air pressure reduced to sea level based on both elevation and temperature. Grass Minimum Depression is the difference of the grass minimum temperature from the air temperatures and is a positive value when the grass temperature is below the air temperature.
Up until March 9 2019 automatic records as Dew Point, Average Wind Speed, Dominant Wind Direction, Wind Run, Rain Rate and Hourly Rain are measured over a 24 hour period starting at midnight and recorded for that day. This started on the 6 October 2011. The automatic record is used for some data and also may be used if data is not available/ not suitable. From March 9 2019 the automatic record became the official record instead, simplifying this process. Until replaced on 5 October 2018 the temperature and humidity sensor is under exposed so minimum temperature and maximum humidity are incorrect and low accuracy rain gauge is used which are not used as the site’s official record. This data limitation does not apply to other measurements of temperatures, air pressure and humidity, wind gust, daily and monthly rainfall and rain days elsewhere in this summary which are recorded separately and form the official record for this site. The replacement equipment is sited in more exposed locations and therefore the limitations don’t apply, though the automatic daily rainfall doesn’t form the official data for the site.
Long term averages are based on all available long period past measurements from October 2019 whilst for non automatic rainfall is based on 1987 to 2017 average from the station record, while. Prior to this the long term average for Temperature, Relative Humidity and Air pressure is based on 2009 to 2015 average from the station record and wind speed is based on the 2010 to 2018 average from station record. Wind Run is 2011 to 2018 and Rain Rate and High Hourly Rain is 2011 to 2017.
The Fraction of monthly average expresses how much has fallen in respect to the long term average listed as a percentage. The decile ranking compares the rainfall total to the historical record for the site where the record is divided into 10 equal groups. Decile 1 is the lowest 10% of the record (10th percentile) and Decile 10 (90th percentile) is the highest 10% of the record. Decile 1 is considered “very low”, decile 2 and 3 “low”, decile 4 to 7 “average”, decile 8 and 9 “high” and decile 10 “very high”.